If you use the docker-compose example verbatim, the dashboard will report the following:
Datadog's docker_daemon integration is reporting:
Instance #0[WARNING]:Unable to find any pid directory in /host/proc. If you are running the agent in a container, make sure to share the volume properly: "/proc:/host/proc:ro". See https://github.com/DataDog/docker-dd-agent/blob/master/README.md for more information. Network metrics will be missing
If you use the docker-compose example verbatim, the dashboard will report the following: